I think that feature is unlocked once you have made a number of posts. It's a safety measure to ensure people don't just sign up in order to sell stuff but actually get involved in the community first.
So I'm kinda (or exactly) on the same line. I have browsed the forum but never really signed up before. Now I have would like to pm another member.
Does anybody now how many posts It will take?
In the FAQ section it says I can contact a board administrator, I just can't see how to.
I would be glad if someone could help me out.